Product Features multi-coated circular polarizing filter ultra-low reflection exclusive multi-coating reduces flare Low profile rim prevents vignetting with wide-angle lenses increases color saturation and contrast cuts reflections from water and window glass 7 Years Manufacturer Canadian Warranty In The Box In The Box Sigma Circular Polarizing Filter 49mm Overview SIGMA DG CIRC. POLARIZING FILTER-OPTIMIZED Overview "Optimized for Digital" -Digital multi-coated circular polarizing filter. Special ultra-low reflection multi-coated Professional Grade lead free optical glass -made in Japan. Optimizes the performance of lenses for digital imaging.Sigma's exclusive Multi-coating reduces flare & ghosting caused by digital camera sensors. Low profile rim prevents vignetting with wide-angle lenses -Black-rimmed glass reduces internal reflection. Increases colour saturation and contrast (deepens blue skies and whitens clouds) and cuts reflections from water and window glass.
